This text analyses that earth noise and electromagnetic reasons and countermeasures penetrated emerge in the printed circuit board signalearth design of PCB.
本文分析pcb印刷电路板信号接地设计中产生接地噪声及电磁幅射的原因和对策。
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Eighteen years earlier, two Cornell physicists, Philip Morrison and Giuseppe Cocconi, had tried to imagine how an intelligent alien civilization might try to signalEarth.